Hydrometer



April 7, 1931.

L. EDELMANN HYDROMETER Filed Aug. 6, 1926l new i Patented Apr. 7, 1931 UNITED ysTaTEs PATENT OFFICE LEO EDELMANN, OF CHICAGO, ILLINOIS, ASSIGNOR TO E. EDELMANN a CO., F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS HYDROMETEB My present invention relates to hydrometers, and particularly to a hydrometer of thesyringe type and a ioat element thereor. An object of this-invention is to provide a structure with which the float element is j held out of contact with the liquid tube or barrel and is cushioned therefrom.

Another object resides inso constructing the parts that the float element is supported* in a' manner to permit free ingress and egress of the liquid.

Still another object lies in so constructing the parts that my invention is adaptable to hydrometer and float structures of various constructions and forms.

With the above and other objects in view,

. which will be apparent to those skilled in the art, this invention includes certain novel features of construction and combination of parts which will be pointedlout in connection with the drawing.

In the drawing: y Figure 1 is a vertical sectional view through one type of hydrometer showing my invention embodied therewith.

Fi 2, is a view in perspective of one of the oat positioning and cushioning rings. Fig. 3 is a perspective view showing the 3 float spacing and cushioning cap.

Fig. 4 is a view in'elevation ofa ioat illustrating a modified adaptation.

Figs. 5, 6 and 7 are fragmentary sectional views to illustrate different forms which the cushioning band might take.

Figs. 8 and9 are fragmentary sectional views showing'modied adaptations of the llhe hydrometer, as illustrated in Fig. 1, has the usual barrel 1 provided with a suction bulb2 at one end and a liquid spout 3 at the remaining end. This liquid spout has/the passage 4 thereof opening into the barrel or tube 1 through -a flat end 5.

The float 6, which is of any desired form and construction, is placed within the tube4 or barrel 1, and as it is customary to make the ioat element Gand the barrel 1 of glass or other transparent frangible material,

these parts are readily `broken through .application led August 6, 192. Serial No. 127,662.

I provide a ring 7 around thel upper extremity of the float chamber 8 which ring is of rubber or other cushion material not readily aiected by acids or` other liquids likely to be tested by the use of the hydrometer. This band 7 is preferably of more or less `elastic rubber so that it will iit and radially extending lugs or projections 9 are provided on 'the band to extend therefrom, preferably at three or more points spaced around the circumference of the band. These projections 9 are so formed that the ioat element 6 can move freely within the barrel l, but thatthe gauge stem 10 thereof will-be at all times spaced from the wall of the tube or barrel 1.

A cap 11, of rubber or other cushion material, is provided tol be fitted over the lower end of the {doatchamber 8, and has radially extended projections or lugs 12 to hold the float element spaced from the inner wall of the barrel and to reduce frictional coutact. This cap 1l has one or more foot lugs or projections 13 which project from the end of the cap to hold the hydrometer ele ment spaced from the `plain end of the spout 3 so that liquid can flow freely through the in'ner end of the passage 4. As shown in Fig. 3, it is perhaps preferable that the cap 11 be slightly reduced at lits open end so that it will be stretched over and will consequently hold in place upon the end of the float chamber 8p.

In Fig. 4 I have'shown the ca 14 without the end legs or projections, an this cap is fitted upon the weight bulb of the hydrometer,'the hydromeler element 15 in this instance being of the type having the weight chamber or bulbL distinct from the loat chamber. Also, I have shown the ring 16 of smaller diameter than ring 7 l so that it i and hold in place upon the float chamber,

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will vfit and hold upon the upper end of the gauge stem 17. In this adaptation the lugs or projections -18 are made longer to project sufficiently to hold the float chamber freinv Y. ripheral rib 7b, as shown in Fig. 7, to fit into a circumferential groove 8l on the fioat chamber.

In Fig. 8 I have shown the cap 19 provided with an end opening 20 so that air will not be caught and pocketed within the cap when this .is fitted in place upon the end of the float chamber; however, in some instancesit may be found desirable to provide an air cushion at this end/,one convenient manner of accomplishing this being illustrated in Fig. 9, where the cap 21 is recessed as at 22 to( provide an air pocket and cushion on the lower end when the cap is fitted upon a float element. The caps 11 and 14 may be formed with similar recesses.

The specific gravity of rubber or other cushion material used in the formation of the cushion bands or caps can be taken into account when the fio-at element is being calibrated, and in this way the fioa't can be accurately gauged. Also, it is possible to more accurately form the float element and balanceuthe same where the float chamber is made relatively plain than where it is necessary to apply beads or points to hold the float spaced from the barreL Where the air cushion is provided, as at 22, this must be taken'into account in Calibrating the float. v

With a hydrometer constructed in accordance with my invention it will be possible to use two of the bands 7 upon the float element and dispense with the cap 11.' In some instances a. single band may be found sufiicient, and other adaptations may function to better advantage with a single band 7 around the float chamber and a band 16 around the gauge stem. The main purpose of my invention is to provide a structure with which the float element is spaced from ,5-5 the tube orbarrel by cushion means, and the cushion means is constructed to reduce-'friot1onal'contact and give a maximum cushionlng effect. As the'lugs or projections upon the bands and caps are relatively small and' will be in most instances more or less tapered or pointed" to reduce frictional contact, a highly eflicient cushion .between the fioat element and the barrel is obtained.

While I have herein shown and described only certain specific embodiments of my invention and have suggested only certain possible modifications, it will be appreciated that changes and variations can be resorted to without departing fromI the spirit an scope of my invention. v

I claim: .j

1. A hydrometer including a float element having a member of cushioning material fitted thereon and provided with projecting lugs, also of cushioning material and of substantially conical bead-like form.

2. A hydrometer comprisin a barrel, a fioat element movable in said member of cushioning material carried by arrel, and a.

the f'loat` element and provided with projections alsoI of cushioning material and Vof substantially conical bead-like form to space the element from the barrel.

3. Ahydrometer comprising a float barrel,

a float element movable within the-barrel, and a band of cushioning material fitted around the float element and provided with projections also of cushioning material and of substantially conical bead-like form to space said element from the barrel.

4. A hydrometer comprising ka float containing member, a float movable within said member, andv av band of cushion material fitted upon the float element and provided with radially extending projections of substantially conical bead-like 'form and also of cushion material.

5. A hydrometer comprising a float barrel, a float\element within the vbarrelya cap of cushion material carried at one end of the float element, and a band of cushion material carried by the float element and spaced from the cap.

6. A hydrometer comprising a oat barrel i a float element within the barrel, a ca 0 cushion material carried at `one end o the float element, and a band of cushion material carried by the fioat element and spaced from the cap, said capI and band being provided with radially extending projections."

7 A hydrometer comprising a oat barrel, a fioat within the barrel, and a cap of cushion material mounted on the lower end of the float element and provided with radial yprojections to space the fioat 'element from the barrel, said cap having a recess at its end to. point. 9. The float element of a cap fitted on the lower end ofthe oat element and rovided with radially extending lugs an vhaving projecting foot lugs at its end. 1,.

10. The combination with a hydrometer fioat element of a cap .fitted on thelower end give added cushioning eji'ect at this combination with a hydrometerl jecting lugs also of cushioning material and of substantially conical bead-'like form.

12. The combination with a hydrometer float element of a cap of cushion material fitted upon the lower end ofthe oat element to cover the bottom and side portions thereof, said cap having laterally projecting lugs of cushiomng material and of substantially conical bead-like form extending from the side wall thereof.

13. The combination with a hydrometer float element of a cap of cushion materia] fittedl upon the lower end of the float element to cover the bottom and side portions thereof, said cap having radial and end projecting lugs on the side and end thereof to space the float element centrally within a ioat barrel and to hold the iioat a ainst closinga spout opening within a. hy rometer. In testimony whereof I hereunto aix m signature. i

t LEO EDELMANN. 

